As of right now, I know that the Nexus 10 is the highest with 2560x1600. Other high-resolution tablets are the Asus TF700T and the Acer A700, both with 1920x1200. Any other tablets with similar or higher resolution screens? I don't want the iPad 3.

I believe the Nexus 10 is the highest right now. Personally if you were looking for an Android tablet, that is the one to get. Direct updates from Google, pretty cheap for what it is with amazing build quality according to the reviews, its looking like a good tablet.